CST MWS仿真方向圖每調(diào)整一次頻率點(diǎn)都要重新仿真一次，這也太麻煩了吧
如題。用CST仿真方向圖的時候，設(shè)置了幾個頻率點(diǎn)。后來想要仿真增益，覺得頻率點(diǎn)太稀疏了，增加了幾個頻率點(diǎn)，又要重新仿真才能得到結(jié)果。HFSS只要仿真完畢，想要得到方向圖和增益都只要在results->creat report中設(shè)置就行了，不需要重新計算。請問是不是我對CST的設(shè)置有問題。我用的是CST2010。有沒有簡單的辦法，用CST計算一次，以后就不用再重復(fù)仿真了，請大家指教。多謝。
小編確定HFSS的results-creat report是一個準(zhǔn)確的輸出結(jié)果的方式?即使沒有在一開始仿真的時候設(shè)置監(jiān)視器?我的感覺是這個結(jié)果是否是通過已有場數(shù)據(jù)經(jīng)過數(shù)值擬合計算得來的呢?
CST確實是這樣，就是如果增加了頻點(diǎn)，必須得重新計算。這個跟算法有關(guān)，跟計算時儲存的結(jié)果有關(guān)。
但是話說回來，我覺得CST應(yīng)該有那種插值擬合場結(jié)果的算法，只是未必準(zhǔn)確。
用時域不行嗎?你可以用時域設(shè)置個寬帶的遠(yuǎn)場監(jiān)視器試試，插值的精度可以定義的，1e-5夠了吧?
的確沒有聽說CST有插值計算場的方法
話說回來：
1.CST是時域算法，增加監(jiān)視器數(shù)量對其仿真時間并不影響或者影響非常小（影響的主要是存貯空間），因而你如果需要比較多的頻點(diǎn)預(yù)先多設(shè)幾個Monitor即可。你仿真前不會連自己需要哪些頻點(diǎn)的Monitor都不知道吧
2.內(nèi)插法畢竟存在誤差，考慮到前面那一條，對CST來說好像真的沒那么必要
有寬帶的遠(yuǎn)場監(jiān)視器啊。
OK。學(xué)習(xí)了，謝謝f1381584904童鞋
根據(jù)Help文件 Solve——>Monitors，Broadband Farfield Monitor即為小編所需的。其采用球面波展開的方法計算遠(yuǎn)場，Accuracy決定了其球面波展開式的階數(shù)，而Freq。Sample決定了瞬態(tài)求解遠(yuǎn)場采樣點(diǎn)的數(shù)量，其余頻點(diǎn)遠(yuǎn)場將通過內(nèi)插得到
Broadband: If a farfield monitor was selected in the type frame a broadband farfield can be calculated during the transient solver run. The broadband farfield monitor is based on an expansion of the farfield in terms of spherical waves. The origin of the expansion is the center of the bounding box. It allows to obtain the farfield at any frequency in the specified range as well as at any time of the simulation. Frequency domain and time domain results can be accessed by selecting plots of a broadband farfield monitor and by the plot properties dialog.
Freq. samples: Choose a number of equidistant frequency samples between Fmin and Fmax where frequency domain farfields are calculated. Results for any frequencies in between are interpolated to obtain broadband information. For a more accurate interpolation over the frequency band increase this value e.g. to "31". An odd number assures that the result at mid frequency is not obtained by interpolation.
Accuracy: Defines the desired accuracy of the farfield. Together with the Fmax and the size of the structure it determines the number of modes required to represent the farfield.
Note that leaving out higher order terms by choosing a lower accuracy is equivalent to low pass filtering the farfield solution. This saves memory and computation time. However, the farfield result has usually less detail.
Transient farfields: This check button activates the additional calculation of transient farfield information which can be displayed afterwards for a certain time in the post processing. Note that in order to accurately obtain time domain farfields the computational effort is higher than for broadband farfields only.
剛開始為了節(jié)省時間，設(shè)置的頻點(diǎn)少。后來想增加頻點(diǎn)，只能重新仿真了。謝謝各位。
